S Register Definitions

S0 Autoanswer Ring Count

Sets the number of the rings required before the modem automatically answers a call. Setting this register to zero disables autoanswer mode.

Range: 0-255

Default: 000

Units: rings

S1 Ring Count

The value of S1 is incremented with each ring. If no rings occur over an 8 second interval, this register is cleared.

Range: 0-255

Default: 000

Units: rings

S2 Escape Character (user defined)

S2 holds the decimal value of the ASCII character used as the escape character. The default value corresponds to an ASCII +. A value over 127 disables the escape process, i.e., no escape character will be recognized.

Range: 0-255

Default: 043

Units: ASCII

S3 Carriage Return <CR> Character (user defined)

Sets the command line and result code terminator character. Pertains to asynchronous operation only.

Range: 0-127, ASCII decimal

Default: 013 (carriage return)

Units: ASCII

S4 Line Feed <LF> Character (user defined)

Sets the character recognized as a line feed. Pertains to asynchronous operation only. The line feed control character is output after the carriage return control character if verbose result codes are used.

Range: 0-27, ASCII decimal

Default: 010 (Line Feed)

Units: ASCII

S5 Back Space <BS> Character (user defined)

Sets the character recognized as a backspace. Pertains to asynchronous operation only. The modem will not recognize the backspace character if it is set to a value that is greater than 32 ASCII. This character can be used to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE, the backspace character, an ASCII space character, and a second backspace character; this means a total of three characters are transmitted each time the modem processes the backspace character.

Range: 0-127, ASCII decimal

Default: 008 (backspace)

Units: ASCII

Appendix F

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Digi 90031300 manual Register Definitions